Stone-sawing machine.



A. W. LIVINGSTON. STONE SAWING MACHINE. APPLICATION TILED FEB. 10. 1906.

Patented Apr. 20, .1909.

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A. W. LIVINGSTON. .STONE SAWING MACHINE. APPLICATION FILED r33. 10/1906. 91 9 1 94,- Patented Apr. 20, 1909.

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A. W. LIVINGSTON.

STONE SAWING MACHINE. APPLICATION FILED I'EB.10. 1906.

Patented Apr. 20, 1909.

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ANDREW W. LIVINGSTON, OF ALAMEDA, CALIFORNIA, ASSIGNOR TO THE UNITED STATES STONE SAW COMPANY, OF TUCSON, ARIZONA TERRITORY, A CORPORATION OF ARIZONA TERRITORY.

STONE-SAWING MACHINE.

Specification of Letters Patent.

Patented April 20, 1909.

T0 all whom it may concern: I

Be it known that I, ANDREW I/V. LIVING- STON, a citizen of the United States, residing at Alameda, Alameda county, California, have invented certain new and useful Improvements in Stone-Sawing Machines, of which the following is a full, clear, and exact description.

My invention relates to improvements in machines for sawing stone, particularly to the type of machines employing an abrasive material such as hardened steel shot. In machines of this type the cut is effected by the ressure of a reciprocating saw beneath the ower bearing edge of which is fed the abrasive material.

The object of this invention is to facilitate a more uniform distribution of the abrasive material at the point where the cutting effect is desired. In accomplishing this object I have constructed an improved saw which particularly cooperates with the mechanism for feeding the abrasive material.

The principles of the invention are illus trated in the accompanying three sheets of drawings. In the preferred form the bearing edges of the saw, which are formed by independent blades, are arranged in a double row, and the abrasive material is fed alongside the adjacent edges of the blades. The feed of the abrasive material and water is effected through a perforated tube which is longitudinally reciprocated or vibrated so as to prevent clogging of the tube, and distribute the abrasive material more regularly and uniformly throughout the length of the saw.'

Figure 1 is aside elevation of those parts of a stone sawing machine which embody the improvements of my invention. Fig. 2 is a plan view and partial section of amachine.

ig. 3 is a side elevation of'the mechanism for feeding the abrasive material. Fig. 4 is a fragmentary end view of a single saw and its carrier beam, with the feed tube for the abrasive material between the lower ends of the blades immediately above the stone. Fig. 5'is a detail of a rocker arm for the feed tube.

1 indicates the'bed of the machine.

2 is the truck on which the stone 3 is mounted.

4 is a main upright of the frame of the machine, one of which is provided at each corner.

5 is a longitudinally arranged side beam supported on the upright 4 and a similar upright at the other end (not shown). One of these beams 5 is arranged on each side of the machine. The entire frame is properly braced and reinforced where necessary to sustain the strains incident to operation.

6 is an upright post. One of these is provided at each corner of the machine for supporting and guiding the saws.

7 is a guide track having its opposite ends supported on the two corner posts 66 and vertically adjustable thereon. One of these tracks is provided on each side of the machine. The saw or saws proper are supported and reciprocated on the tracks 7.

8 is a carriage provided with suitablerollers mounted above and below the track 7 so as to be guided thereon. Two of these carriages are mounted on each of the tracks 7.

99 are two transverse rods supported on short links 1010 on the opposite ends, each link being pivotally mounted in one end of the carriage 8. The ends of the rods 99 are connected by a rod 1 1.

12 is a pitman connected to the right hand rod 9. One pitman is connected to each end of this rod. Power is thus applied for reciprocating the saw.

13 represents a beam or carrier for one saw. A series of these beams may be mounted upon the rods 99 so as to effect as many cuts as desired. In Fig. 2, the rods 99 are omitted, but the sections of four saws are illustrated.

A beam 13 and the parts carried thereby constitute a saw proper, while the parts 8, 9, 10 and 11 constitute the carriage mechanism.

1 1-1 1 are posts stepped to the opposite ends of the beam 13.

15 is a beam which is adjustably clamped by bolts 15 15 to the posts 1414.

1616 are blades providing the bearing areas at their lower ends for cooperation with the abrasive material. These blades are clamped to the upper beam 15 and also clamped to the beam 13.

1616 are blades arranged parallel with the blades 1616 and spaced apart slightly therefrom by means of blocks such as 17. Each adjacent pair of blades 16 and 16 is clamped as a pair to the upper and lower 7 beam in any suitable manner.

22 is a feed tube for the abrasive material which is preferably laterally perforated and extends between the adjacent sides of the blades 16-l6 and longitudinally of the saw.

23 is a tank or reservoir for containing the abrasive material and water, which is customary.

24 is a flexible connection between the feed tube 22 and the pipe 25.

26 is a valve controlling the passage of the pipe 25.

27 is a shaft having its ends supported by the two left hand posts 6-6 and vertically adjustable.

28 is a supporting lever carried by the shaft 27 for guiding the left hand end of th feed tube 22.

29 is a rock shaft having its ends carried by the right hand posts 66 and vertically adjustable thereon.

30 is a lever carried by the shaft 29 and connected at its upper end to the feed tube 22. A feed tube and the supporting levers 28 and 30 are, of course, provided for each saw.

31 is a pulley rotatably supported by the frame of the machine and driven from any suitable source of power. The end of the pulley shaft carries a cam of small eccentricity (not shown) on which the eccentric strap 32 is mounted.

33 is a short arm lever projecting from the rock shaft 29 and connected to the eccentric strap 32 by a rod which is preferably extensible, as shown in Fig. 3.

34 is the upper end of the rod.

35 is a clamp block and 36 is the lower end of the rod loosely connected with the lever 33. The rod may thus be connected to provide for vertical adjustment of the feed tube 22 to correspond with the height of the particular stone which is being operated upon.

The rotation of the pulley 31 causes oscillation of the rock shaft 29 through the medium of the eccentric strap 32 and rod connection to the lever 33. This reciprocates the feed tube 22 through the medium of the lever 30, so that the abrasive material is caused to settle down in the tube and be more easily fed therethrough without danger of clogging or interruption.

The particular form of mechanism for reiprocating the feed tube 22 shown herein is the preferred form, but I do not wish myself to be understood as limited to this particular form.

By placing the feed tube 22 between the blades 1616, space is economized and it is possible to place the saws much closer together. In the form shown herein, each saw has two series of blades, spaced apart so that a narrow slab of stone will be cut out between the same. The thickness of this slab will depend obviously upon the transverse spacing of the saw blades. This spacing will depend upon the thickness of the block 17 and may be increased or diminished as described.

The construction of the saw is such that a wide variety of adjustments may be effected. In the saw shown at the top of Fig. 2 only three blades are shown, as distinguished from the six in the other saws of this figure. The blades are arranged alternately, first on one side and then on the other of the feed tube 22. This arrangement, of course, may be carried out through any number of blades, this particular figure showing only three blades longitudinally instead of six, as shown in Fig. 1. This arrangement is sometimes useful for certain classes of work. This par ticular arrangement may be slightly varied by changing the thickness of the space blocks 17 which are employed. With a space block 17 of less thickness than the blade 16, it will be seen that the blade 16 will be offset from the blade 16 a distance less than its thickness. This is particularly useful in making a out which is wider than the thickness of either cutting blade. I Vith such an arrangement of the blades of the saw it is obvious that if the feed tubes 22 be placed on one side of the saw blades, the abrasive material is thus fed into the cut in the stone alongside the blade. The out being wider than the blade, the

abrasive material falls freely to the bottom of the cut. There is therefore no danger of striation of the stone. That I claim is 1. In a stone sawing machine, a series of saw blades, arranged to form a single kerf and means for reciprocating the same to and fro, a feed tube for abrasive material, said tube being in a plane parallel to said series of blades, and means to reciprocate the same in the line of reciprocation of the saw blades but independently of the saw blades.

2. In a stone sawing machine, a saw having blades arranged in two planes, and means independent of the blades and between said blades for distributing abrasive material along the sides of the adjacent faces of said blades.

3. In a stone sawing machine, a saw having a plurality of companion blades arranged in different planes for forming a single kerf, and means for feeding the abrasive material into said kerf in a plane between the blades, said means being reciprocable independently of the blades.

4. In a stone sawing machine, a plurality of blades arranged in planes offset from one another, means extending longitudinally 'of the blades for feeding abrasive material along the sides of said blades, and means for reciprocating said feeding means in a plane parallel to the saw blades.

5. In a stone sawing machine, a saw comprising a plurality of blades arranged in two longitudinal rows, an adjustable feed tube for abrasive material, reciprocably mounted between said blades and reciprocating longitudinally of said saw, and means for reciprocating said feed tube.

6. In a stone sawing machine, a saw comrising a plurality of blades arranged in two ongitudinal rows, a feed tube for abrasive material located longitudinally between said rows of blades, and means for reciprocating said feed tube independently of the blades and in the same direction therewith.

7. In a stone sawing machine, a saw having blades arranged in two rows, and adjustable and independently reci rocable means for feeding abrasive material etween the adjacent blades in the two rows.

8. In a stone sawing machine, a saw having a plurality of blades oflset so as to efiect a cut of greater width than the thickness'of any one of the blades, and independently longitudinally reciprocable means for-feeding abrasive material along the said saw.

ANDREW W. LIVINGSTON.

Witnesses:

J. A. SoHUPP, GEO. ASHLEY. 

